Pyranderivate der allgemeinen Formeln la, Ib und Ic
in denen R1, R2, R3, R4, R5 und X die in der Beschreibung angegebenen Bedeutungen haben, Verfahren zu ihrer Herstellung und ihre Verwendung zur Bekämpfung von Schädlingen.
通式 la、Ib 和 Ic 的吡喃衍生物,其中 R1、R2、R3、R4、R5 和 X 具有描述中给出的含义,其制备工艺及其在防治害虫中的用途。
Ni–NiO heterojunctions: a versatile nanocatalyst for regioselective halogenation and oxidative esterification of aromatics
作者:Nivedita Bhardwaj、Ajit Kumar Singh、Nancy Tripathi、Bharat Goel、Arindam Indra、Shreyans K. Jain
DOI:10.1039/d1nj02777h
日期:——
Ni–NiO nanoparticles catalyzed the oxidative esterification of carbonylcompounds with alcohol, diol or dithiol in the presence of a catalytic amount of NBS. It was observed that the aromaticcarbonyls substituted with an electron-donating group favoured nuclear halogenation, whereas an electron-withdrawing group substitution in carbonylcompounds facilitated the oxidation reaction. In addition, the catalyst